<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id: Http.class.php 2504 2011-12-28 07:35:29Z liu21st $


/**
 +------------------------------------------------------------------------------
 * Http 工具类
 * 提供一系列的Http方法
 +------------------------------------------------------------------------------
 * @category   ORG
 * @package  ORG
 * @subpackage  Net
 * @author    liu21st <liu21st@gmail.com>
 * @version   $Id: Http.class.php 2504 2011-12-28 07:35:29Z liu21st $
 +------------------------------------------------------------------------------
 */
class Http {
	
	/**
     +----------------------------------------------------------
	 * 采集远程文件
     +----------------------------------------------------------
	 * @access public
     +----------------------------------------------------------
	 * @param string $remote 远程文件名
	 * @param string $local 本地保存文件名
     +----------------------------------------------------------
	 * @return mixed
     +----------------------------------------------------------
	 */
	static public function curlDownload($remote, $local) {
		$cp = curl_init ( $remote );
		$fp = fopen ( $local, "w" );
		curl_setopt ( $cp, CURLOPT_FILE, $fp );
		curl_setopt ( $cp, CURLOPT_HEADER, 0 );
		curl_exec ( $cp );
		curl_close ( $cp );
		fclose ( $fp );
	}
	
	/**
    +-----------------------------------------------------------
	 * 使用 fsockopen 通过 HTTP 协议直接访问(采集)远程文件
	 * 如果主机或服务器没有开启 CURL 扩展可考虑使用
	 * fsockopen 比 CURL 稍慢,但性能稳定
    +-----------------------------------------------------------
	 * @static
	 * @access public
    +-----------------------------------------------------------
	 * @param string $url 远程URL
	 * @param array $conf 其他配置信息
	 * int   limit 分段读取字符个数
	 * string post  post的内容,字符串或数组,key=value&形式
	 * string cookie 携带cookie访问,该参数是cookie内容
	 * string ip    如果该参数传入,$url将不被使用,ip访问优先
	 * int    timeout 采集超时时间
	 * bool   block 是否阻塞访问,默认为true
    +-----------------------------------------------------------
	 * @return mixed
    +-----------------------------------------------------------
	 */
	static public function fsockopenDownload($url, $conf = array()) {
		$return = '';
		if (! is_array ( $conf ))
			return $return;
		
		$matches = parse_url ( $url );
		! isset ( $matches ['host'] ) && $matches ['host'] = '';
		! isset ( $matches ['path'] ) && $matches ['path'] = '';
		! isset ( $matches ['query'] ) && $matches ['query'] = '';
		! isset ( $matches ['port'] ) && $matches ['port'] = '';
		$host = $matches ['host'];
		$path = $matches ['path'] ? $matches ['path'] . ($matches ['query'] ? '?' . $matches ['query'] : '') : '/';
		$port = ! empty ( $matches ['port'] ) ? $matches ['port'] : 80;
		
		$conf_arr = array ('limit' => 0, 'post' => '', 'cookie' => '', 'ip' => '', 'timeout' => 15, 'block' => TRUE );
		
		foreach ( array_merge ( $conf_arr, $conf ) as $k => $v )
			${$k} = $v;
		
		if ($post) {
			if (is_array ( $post )) {
				$post = http_build_query ( $post );
			}
			$out = "POST $path HTTP/1.0\r\n";
			$out .= "Accept: */*\r\n";
			//$out .= "Referer: $boardurl\r\n";
			$out .= "Accept-Language: zh-cn\r\n";
			$out .= "Content-Type: application/x-www-form-urlencoded\r\n";
			$out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";
			$out .= "Host: $host\r\n";
			$out .= 'Content-Length: ' . strlen ( $post ) . "\r\n";
			$out .= "Connection: Close\r\n";
			$out .= "Cache-Control: no-cache\r\n";
			$out .= "Cookie: $cookie\r\n\r\n";
			$out .= $post;
		} else {
			$out = "GET $path HTTP/1.0\r\n";
			$out .= "Accept: */*\r\n";
			//$out .= "Referer: $boardurl\r\n";
			$out .= "Accept-Language: zh-cn\r\n";
			$out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";
			$out .= "Host: $host\r\n";
			$out .= "Connection: Close\r\n";
			$out .= "Cookie: $cookie\r\n\r\n";
		}
		$fp = @fsockopen ( ($ip ? $ip : $host), $port, $errno, $errstr, $timeout );
		if (! $fp) {
			return '';
		} else {
			stream_set_blocking ( $fp, $block );
			stream_set_timeout ( $fp, $timeout );
			@fwrite ( $fp, $out );
			$status = stream_get_meta_data ( $fp );
			if (! $status ['timed_out']) {
				while ( ! feof ( $fp ) ) {
					if (($header = @fgets ( $fp )) && ($header == "\r\n" || $header == "\n")) {
						break;
					}
				}
				
				$stop = false;
				while ( ! feof ( $fp ) && ! $stop ) {
					$data = fread ( $fp, ($limit == 0 || $limit > 8192 ? 8192 : $limit) );
					$return .= $data;
					if ($limit) {
						$limit -= strlen ( $data );
						$stop = $limit <= 0;
					}
				}
			}
			@fclose ( $fp );
			return $return;
		}
	}
	
	/**
     +----------------------------------------------------------
	 * 下载文件
	 * 可以指定下载显示的文件名，并自动发送相应的Header信息
	 * 如果指定了content参数，则下载该参数的内容
     +----------------------------------------------------------
	 * @static
	 * @access public
     +----------------------------------------------------------
	 * @param string $filename 下载文件名
	 * @param string $showname 下载显示的文件名
	 * @param string $content  下载的内容
	 * @param integer $expire  下载内容浏览器缓存时间
     +----------------------------------------------------------
	 * @return void
     +----------------------------------------------------------
	 * @throws ThinkExecption
     +----------------------------------------------------------
	 */
	static public function download($filename, $showname = '', $content = '', $expire = 180) {
		if (is_file ( $filename )) {
			$length = filesize ( $filename );
		} elseif (is_file ( UPLOAD_PATH . $filename )) {
			$filename = UPLOAD_PATH . $filename;
			$length = filesize ( $filename );
		} elseif ($content != '') {
			$length = strlen ( $content );
		} else {
			throw_exception ( $filename . L ( '下载文件不存在！' ) );
		}
		if (empty ( $showname )) {
			$showname = $filename;
		}
		$showname = basename ( $showname );
		if (! empty ( $filename )) {
			$type = mime_content_type ( $filename );
		} else {
			$type = "application/octet-stream";
		}
		//发送Http Header信息 开始下载
		header ( "Pragma: public" );
		header ( "Cache-control: max-age=" . $expire );
		//header('Cache-Control: no-store, no-cache, must-revalidate');
		header ( "Expires: " . gmdate ( "D, d M Y H:i:s", time () + $expire ) . "GMT" );
		header ( "Last-Modified: " . gmdate ( "D, d M Y H:i:s", time () ) . "GMT" );
		header ( "Content-Disposition: attachment; filename=" . $showname );
		header ( "Content-Length: " . $length );
		header ( "Content-type: " . $type );
		header ( 'Content-Encoding: none' );
		header ( "Content-Transfer-Encoding: binary" );
		if ($content == '') {
			readfile ( $filename );
		} else {
			echo ($content);
		}
		exit ();
	}
	
	/**
     +----------------------------------------------------------
	 * 显示HTTP Header 信息
     +----------------------------------------------------------
	 * @return string
     +----------------------------------------------------------
	 */
	static function getHeaderInfo($header = '', $echo = true) {
		ob_start ();
		$headers = getallheaders ();
		if (! empty ( $header )) {
			$info = $headers [$header];
			echo ($header . ':' . $info . "\n");
			;
		} else {
			foreach ( $headers as $key => $val ) {
				echo ("$key:$val\n");
			}
		}
		$output = ob_get_clean ();
		if ($echo) {
			echo (nl2br ( $output ));
		} else {
			return $output;
		}
	
	}
	
	/**
	 * HTTP Protocol defined status codes
	 * @param int $num
	 */
	static function sendHttpStatus($code) {
		static $_status = array (// Informational 1xx
		100 => 'Continue', 101 => 'Switching Protocols', 

		// Success 2xx
		200 => 'OK', 201 => 'Created', 202 => 'Accepted', 203 => 'Non-Authoritative Information', 204 => 'No Content', 205 => 'Reset Content', 206 => 'Partial Content', 

		// Redirection 3xx
		300 => 'Multiple Choices', 301 => 'Moved Permanently', 302 => 'Found', // 1.1
303 => 'See Other', 304 => 'Not Modified', 305 => 'Use Proxy', // 306 is deprecated but reserved
		307 => 'Temporary Redirect', 

		// Client Error 4xx
		400 => 'Bad Request', 401 => 'Unauthorized', 402 => 'Payment Required', 403 => 'Forbidden', 404 => 'Not Found', 405 => 'Method Not Allowed', 406 => 'Not Acceptable', 407 => 'Proxy Authentication Required', 408 => 'Request Timeout', 409 => 'Conflict', 410 => 'Gone', 411 => 'Length Required', 412 => 'Precondition Failed', 413 => 'Request Entity Too Large', 414 => 'Request-URI Too Long', 415 => 'Unsupported Media Type', 416 => 'Requested Range Not Satisfiable', 417 => 'Expectation Failed', 

		// Server Error 5xx
		500 => 'Internal Server Error', 501 => 'Not Implemented', 502 => 'Bad Gateway', 503 => 'Service Unavailable', 504 => 'Gateway Timeout', 505 => 'HTTP Version Not Supported', 509 => 'Bandwidth Limit Exceeded' );
		if (isset ( $_status [$code] )) {
			header ( 'HTTP/1.1 ' . $code . ' ' . $_status [$code] );
		}
	}
} //类定义结束
if (! function_exists ( 'mime_content_type' )) {
	/**
     +----------------------------------------------------------
	 * 获取文件的mime_content类型
     +----------------------------------------------------------
	 * @return string
     +----------------------------------------------------------
	 */
	function mime_content_type($filename) {
		static $contentType = array ('ai' => 'application/postscript', 'aif' => 'audio/x-aiff', 'aifc' => 'audio/x-aiff', 'aiff' => 'audio/x-aiff', 'asc' => 'application/pgp', //changed by skwashd - was text/plain
'asf' => 'video/x-ms-asf', 'asx' => 'video/x-ms-asf', 'au' => 'audio/basic', 'avi' => 'video/x-msvideo', 'bcpio' => 'application/x-bcpio', 'bin' => 'application/octet-stream', 'bmp' => 'image/bmp', 'c' => 'text/plain', // or 'text/x-csrc', //added by skwashd
'cc' => 'text/plain', // or 'text/x-c++src', //added by skwashd
'cs' => 'text/plain', //added by skwashd - for C# src
'cpp' => 'text/x-c++src', //added by skwashd
'cxx' => 'text/x-c++src', //added by skwashd
'cdf' => 'application/x-netcdf', 'class' => 'application/octet-stream', //secure but application/java-class is correct
'com' => 'application/octet-stream', //added by skwashd
'cpio' => 'application/x-cpio', 'cpt' => 'application/mac-compactpro', 'csh' => 'application/x-csh', 'css' => 'text/css', 'csv' => 'text/comma-separated-values', //added by skwashd
'dcr' => 'application/x-director', 'diff' => 'text/diff', 'dir' => 'application/x-director', 'dll' => 'application/octet-stream', 'dms' => 'application/octet-stream', 'doc' => 'application/msword', 'dot' => 'application/msword', //added by skwashd
'dvi' => 'application/x-dvi', 'dxr' => 'application/x-director', 'eps' => 'application/postscript', 'etx' => 'text/x-setext', 'exe' => 'application/octet-stream', 'ez' => 'application/andrew-inset', 'gif' => 'image/gif', 'gtar' => 'application/x-gtar', 'gz' => 'application/x-gzip', 'h' => 'text/plain', // or 'text/x-chdr',//added by skwashd
'h++' => 'text/plain', // or 'text/x-c++hdr', //added by skwashd
'hh' => 'text/plain', // or 'text/x-c++hdr', //added by skwashd
'hpp' => 'text/plain', // or 'text/x-c++hdr', //added by skwashd
'hxx' => 'text/plain', // or 'text/x-c++hdr', //added by skwashd
'hdf' => 'application/x-hdf', 'hqx' => 'application/mac-binhex40', 'htm' => 'text/html', 'html' => 'text/html', 'ice' => 'x-conference/x-cooltalk', 'ics' => 'text/calendar', 'ief' => 'image/ief', 'ifb' => 'text/calendar', 'iges' => 'model/iges', 'igs' => 'model/iges', 'jar' => 'application/x-jar', //added by skwashd - alternative mime type
'java' => 'text/x-java-source', //added by skwashd
'jpe' => 'image/jpeg', 'jpeg' => 'image/jpeg', 'jpg' => 'image/jpeg', 'js' => 'application/x-javascript', 'kar' => 'audio/midi', 'latex' => 'application/x-latex', 'lha' => 'application/octet-stream', 'log' => 'text/plain', 'lzh' => 'application/octet-stream', 'm3u' => 'audio/x-mpegurl', 'man' => 'application/x-troff-man', 'me' => 'application/x-troff-me', 'mesh' => 'model/mesh', 'mid' => 'audio/midi', 'midi' => 'audio/midi', 'mif' => 'application/vnd.mif', 'mov' => 'video/quicktime', 'movie' => 'video/x-sgi-movie', 'mp2' => 'audio/mpeg', 'mp3' => 'audio/mpeg', 'mpe' => 'video/mpeg', 'mpeg' => 'video/mpeg', 'mpg' => 'video/mpeg', 'mpga' => 'audio/mpeg', 'ms' => 'application/x-troff-ms', 'msh' => 'model/mesh', 'mxu' => 'video/vnd.mpegurl', 'nc' => 'application/x-netcdf', 'oda' => 'application/oda', 'patch' => 'text/diff', 'pbm' => 'image/x-portable-bitmap', 'pdb' => 'chemical/x-pdb', 'pdf' => 'application/pdf', 'pgm' => 'image/x-portable-graymap', 'pgn' => 'application/x-chess-pgn', 'pgp' => 'application/pgp', //added by skwashd
'php' => 'application/x-httpd-php', 'php3' => 'application/x-httpd-php3', 'pl' => 'application/x-perl', 'pm' => 'application/x-perl', 'png' => 'image/png', 'pnm' => 'image/x-portable-anymap', 'po' => 'text/plain', 'ppm' => 'image/x-portable-pixmap', 'ppt' => 'application/vnd.ms-powerpoint', 'ps' => 'application/postscript', 'qt' => 'video/quicktime', 'ra' => 'audio/x-realaudio', 'rar' => 'application/octet-stream', 'ram' => 'audio/x-pn-realaudio', 'ras' => 'image/x-cmu-raster', 'rgb' => 'image/x-rgb', 'rm' => 'audio/x-pn-realaudio', 'roff' => 'application/x-troff', 'rpm' => 'audio/x-pn-realaudio-plugin', 'rtf' => 'text/rtf', 'rtx' => 'text/richtext', 'sgm' => 'text/sgml', 'sgml' => 'text/sgml', 'sh' => 'application/x-sh', 'shar' => 'application/x-shar', 'shtml' => 'text/html', 'silo' => 'model/mesh', 'sit' => 'application/x-stuffit', 'skd' => 'application/x-koan', 'skm' => 'application/x-koan', 'skp' => 'application/x-koan', 'skt' => 'application/x-koan', 'smi' => 'application/smil', 'smil' => 'application/smil', 'snd' => 'audio/basic', 'so' => 'application/octet-stream', 'spl' => 'application/x-futuresplash', 'src' => 'application/x-wais-source', 'stc' => 'application/vnd.sun.xml.calc.template', 'std' => 'application/vnd.sun.xml.draw.template', 'sti' => 'application/vnd.sun.xml.impress.template', 'stw' => 'application/vnd.sun.xml.writer.template', 'sv4cpio' => 'application/x-sv4cpio', 'sv4crc' => 'application/x-sv4crc', 'swf' => 'application/x-shockwave-flash', 'sxc' => 'application/vnd.sun.xml.calc', 'sxd' => 'application/vnd.sun.xml.draw', 'sxg' => 'application/vnd.sun.xml.writer.global', 'sxi' => 'application/vnd.sun.xml.impress', 'sxm' => 'application/vnd.sun.xml.math', 'sxw' => 'application/vnd.sun.xml.writer', 't' => 'application/x-troff', 'tar' => 'application/x-tar', 'tcl' => 'application/x-tcl', 'tex' => 'application/x-tex', 'texi' => 'application/x-texinfo', 'texinfo' => 'application/x-texinfo', 'tgz' => 'application/x-gtar', 'tif' => 'image/tiff', 'tiff' => 'image/tiff', 'tr' => 'application/x-troff', 'tsv' => 'text/tab-separated-values', 'txt' => 'text/plain', 'ustar' => 'application/x-ustar', 'vbs' => 'text/plain', //added by skwashd - for obvious reasons
'vcd' => 'application/x-cdlink', 'vcf' => 'text/x-vcard', 'vcs' => 'text/calendar', 'vfb' => 'text/calendar', 'vrml' => 'model/vrml', 'vsd' => 'application/vnd.visio', 'wav' => 'audio/x-wav', 'wax' => 'audio/x-ms-wax', 'wbmp' => 'image/vnd.wap.wbmp', 'wbxml' => 'application/vnd.wap.wbxml', 'wm' => 'video/x-ms-wm', 'wma' => 'audio/x-ms-wma', 'wmd' => 'application/x-ms-wmd', 'wml' => 'text/vnd.wap.wml', 'wmlc' => 'application/vnd.wap.wmlc', 'wmls' => 'text/vnd.wap.wmlscript', 'wmlsc' => 'application/vnd.wap.wmlscriptc', 'wmv' => 'video/x-ms-wmv', 'wmx' => 'video/x-ms-wmx', 'wmz' => 'application/x-ms-wmz', 'wrl' => 'model/vrml', 'wvx' => 'video/x-ms-wvx', 'xbm' => 'image/x-xbitmap', 'xht' => 'application/xhtml+xml', 'xhtml' => 'application/xhtml+xml', 'xls' => 'application/vnd.ms-excel', 'xlt' => 'application/vnd.ms-excel', 'xml' => 'application/xml', 'xpm' => 'image/x-xpixmap', 'xsl' => 'text/xml', 'xwd' => 'image/x-xwindowdump', 'xyz' => 'chemical/x-xyz', 'z' => 'application/x-compress', 'zip' => 'application/zip' );
		$type = strtolower ( substr ( strrchr ( $filename, '.' ), 1 ) );
		if (isset ( $contentType [$type] )) {
			$mime = $contentType [$type];
		} else {
			$mime = 'application/octet-stream';
		}
		return $mime;
	}
}

if (! function_exists ( 'image_type_to_extension' )) {
	function image_type_to_extension($imagetype) {
		if (empty ( $imagetype ))
			return false;
		switch ($imagetype) {
			case IMAGETYPE_GIF :
				return '.gif';
			case IMAGETYPE_JPEG :
				return '.jpg';
			case IMAGETYPE_PNG :
				return '.png';
			case IMAGETYPE_SWF :
				return '.swf';
			case IMAGETYPE_PSD :
				return '.psd';
			case IMAGETYPE_BMP :
				return '.bmp';
			case IMAGETYPE_TIFF_II :
				return '.tiff';
			case IMAGETYPE_TIFF_MM :
				return '.tiff';
			case IMAGETYPE_JPC :
				return '.jpc';
			case IMAGETYPE_JP2 :
				return '.jp2';
			case IMAGETYPE_JPX :
				return '.jpf';
			case IMAGETYPE_JB2 :
				return '.jb2';
			case IMAGETYPE_SWC :
				return '.swc';
			case IMAGETYPE_IFF :
				return '.aiff';
			case IMAGETYPE_WBMP :
				return '.wbmp';
			case IMAGETYPE_XBM :
				return '.xbm';
			default :
				return false;
		}
	}

}